<h2>Code</h2>
<pre><code>
CONFIGURATION DefaultCfg
    VAR_GLOBAL
      Start_Stop AT %IX0.0: BOOL; (* This is a comment *)
    END_VAR
    TASK NewTask  (INTERVAL := T#20ms);
    PROGRAM Main WITH NewTask : PLC_PRG;
END_CONFIGURATION
  
PROGRAM demo
    VAR_EXTERNAL
      Start_Stop: BOOL;
      StringVar: STRING[250] := "Test String"
    END_VAR
    VAR
      a : REAL; // Another comment
      todTest: TIME_OF_DAY := TOD#12:55;
    END_VAR
    a := csq(12.5);
    IF a > REAL#100 - 16#FAC0 + 2#1001_0110 THEN
      Start_Stop := TRUE;
    END_IF
END_PROGRAM;
  
FUNCTION_BLOCK PRIVATE MyName EXTENDS AnotherName
      
END_FUNCTION_BLOCK

/* Get a square of the circle */
FUNCTION csq : REAL 
    VAR_INPUT
      r: REAL;
    END_VAR
    VAR CONSTANT
      c_pi: REAL := 3.14;
    END_VAR
    csq := ABS(c_pi * (r * 2));
END_FUNCTION
</code></pre>